PT-2026-36956 · WordPress · Simple Owl Shortcodes

Nail Majdeddine · Published 2026-05-05 · Updated 2026-05-21 · CVE-2026-6255

Positive Technologies (AI Summary)

CVSS v3.1

6.4

Medium

Base vector

AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N

Name of the Vulnerable Software and Affected Versions Simple Owl Shortcodes versions prior to 2.1.2

Description The Simple Owl Shortcodes plugin for WordPress contains a Stored Cross-Site Scripting issue. This occurs due to insufficient input sanitization and output escaping of user-supplied attributes within the 'owls wrapper' shortcode, specifically affecting the num attribute. Authenticated attackers with contributor-level access or higher can inject arbitrary web scripts into pages, which then execute when a user visits the affected page.

Recommendations Update to a version later than 2.1.1. As a temporary workaround, restrict the use of the num attribute in the 'owls wrapper' shortcode.

Fix

XSS

Weakness Enumeration

CWE-79

Related Identifiers

CVE-2026-6255

Affected Products

Simple Owl Shortcodes

References · 9

• https://nvd.nist.gov/vuln/detail/CVE-2026-6255 · Security Note
• https://t.me/CVEtracker/52698 · Telegram Post
• https://wordfence.com/threat-intel/vulnerabilities/id/e33a2f27-20c2-4963-9558-1eead0515690?source=cve · Note
• https://reddit.com/r/StopBadBots/comments/1tjv1es/critical_warning_62_plugins_2_themes_11_still · Reddit Post
• https://twitter.com/CVEarity/status/2051589982918525305 · Twitter Post
• https://plugins.trac.wordpress.org/browser/simple-owl-shortcodes/tags/2.1.1/inc/owls_wrapper.php#L11 · Note
• https://twitter.com/VulmonFeeds/status/2051600761910358177 · Twitter Post
• https://plugins.trac.wordpress.org/browser/simple-owl-shortcodes/trunk/inc/owls_wrapper.php#L11 · Note
• https://reddit.com/r/StopBadBots/comments/1td9gea/critical_warning_these_14_wordpress_plugins · Reddit Post